We outline the derivation of expressions for higher-order scattered electric field strengths, including both multiple inter- and intraparticle scattering events, although only the former are of practical interest. Next an ensemble-averaging procedure for calculating the averages of second-order quantities is proposed and subsequently applied to derive equations for the average ... read more scattered intensity and the intensity autocorrelation function including second-order scattering. From these equations iterative schemes for correcting experimental data for double scattering are obtained. These iterative procedures are discussed and applied to a well-defined colloidal system. show less